/* tongiao.com.vn – giao diện: xanh rêu · vàng kim · đỏ sen */
[hidden]{display:none!important}
:root{
  --green:#283b28;--green-2:#1f2f20;--green-3:#334c33;--gold:#d9bf86;--gold-2:#c4a35f;--gold-soft:#efe3c4;
  --lotus:#b4532a;--cream:#f8f4ea;--paper:#fffdf7;--ink:#2a2a22;--muted:#6b675a;--line:#e5dcc6;
  --serif:"Cormorant Garamond","Noto Serif","Times New Roman",Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Helvetica Neue",Arial,sans-serif;
  --r:12px;--sh:0 1px 2px rgba(40,59,40,.06),0 6px 20px rgba(40,59,40,.07);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--cream);color:var(--ink);font:400 1.0625rem/1.65 var(--sans)}
img,video{max-width:100%;height:auto}
a{color:#5a4415;text-decoration-color:rgba(90,68,21,.35);text-underline-offset:3px}
a:hover{color:var(--lotus)}
:focus-visible{outline:3px solid var(--gold-2);outline-offset:2px;border-radius:4px}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 14px;z-index:99}
.skip:focus{left:8px}
.notice{background:var(--gold);color:var(--green-2);text-align:center;font-size:.92rem;padding:6px 12px}
.muted{color:var(--muted)} .muted-l{color:var(--muted);font-weight:400}
.empty{color:var(--muted);padding:40px 0;text-align:center}

/* Header */
.top{background:var(--green);color:var(--gold-soft);position:sticky;top:0;z-index:30;box-shadow:0 2px 10px rgba(0,0,0,.18)}
.top-in{display:flex;align-items:center;gap:16px;padding-top:8px;padding-bottom:8px}
.brand{display:flex;align-items:center;gap:10px;color:var(--gold);text-decoration:none;flex-shrink:0}
.brand img{height:52px;width:auto}
.brand b{display:block;font:600 1.6rem/1 var(--serif);letter-spacing:.04em;color:var(--gold)}
.brand small{display:block;font-size:.72rem;letter-spacing:.14em;color:#b9ab84;text-transform:uppercase;margin-top:3px}
.search-top{margin-left:auto;display:flex;background:rgba(255,255,255,.08);border:1px solid rgba(217,191,134,.35);border-radius:999px;overflow:hidden;width:min(360px,40vw)}
.search-top input{flex:1;min-width:0;background:transparent;border:0;color:#fff;padding:9px 14px;font:inherit;font-size:.95rem}
.search-top input::placeholder{color:#b9ab84}
.search-top button{background:transparent;border:0;color:var(--gold);padding:0 14px;cursor:pointer}
.fs{display:flex;gap:2px}
.fs button{background:transparent;border:1px solid rgba(217,191,134,.35);color:var(--gold);border-radius:6px;padding:4px 7px;cursor:pointer;font-size:.8rem}
.menu-btn{display:none;background:transparent;border:0;padding:8px;cursor:pointer}
.menu-btn span{display:block;width:24px;height:2px;background:var(--gold);margin:5px 0}
.nav{background:var(--green-2);border-top:1px solid rgba(217,191,134,.18)}
.nav ul{display:flex;flex-wrap:wrap;list-style:none;margin:0 auto;padding-top:0;padding-bottom:0}
.nav li{position:relative}
.nav .tg{display:none}
.nav li>a{display:block;padding:11px 14px;color:var(--gold-soft);text-decoration:none;font-size:.97rem;border-bottom:2px solid transparent}
.nav li>a:hover,.nav li>a[aria-current],.nav li.on>a{color:var(--gold);border-bottom-color:var(--gold)}
.nav .sub{display:none;position:absolute;left:0;top:100%;background:var(--paper);min-width:220px;padding:8px;border-radius:0 0 var(--r) var(--r);box-shadow:var(--sh);border:1px solid var(--line)}
.nav .sub.wide{min-width:440px;display:none;grid-template-columns:1fr 1fr}
.nav .sub a{display:block;padding:7px 12px;color:var(--ink);text-decoration:none;border-radius:8px;font-size:.95rem}
.nav .sub a:hover{background:var(--gold-soft);color:var(--green)}
.nav .sub.grp{min-width:340px}
.nav .sub.grp a{padding:9px 12px}
.nav .sub.grp b{display:block;font:600 1.12rem var(--serif);color:var(--green)}
.nav .sub.grp small{display:block;color:var(--muted);font-size:.8rem;line-height:1.35}
.nav li.has-sub:hover .sub,.nav li.has-sub:focus-within .sub{display:block}
.nav li.has-sub:hover .sub.wide,.nav li.has-sub:focus-within .sub.wide{display:grid}

/* Hero */
.hero{background:radial-gradient(ellipse at 30% 40%,#35503a 0%,var(--green) 55%,var(--green-2) 100%);color:var(--gold-soft)}
.hero-in{display:grid;grid-template-columns:320px 1fr;gap:40px;align-items:center;padding-top:36px;padding-bottom:44px}
.hero-logo{width:320px;height:auto;border-radius:16px}
.hero h1{font:600 clamp(2rem,4vw,3.1rem)/1.15 var(--serif);color:var(--gold);margin:0 0 12px;letter-spacing:.01em}
.hero p{font-size:1.12rem;max-width:620px;margin:0 0 22px;color:#e8dfc6}
.hero-search{display:flex;gap:8px;max-width:560px}
.hero-search input{flex:1;min-width:0;padding:13px 16px;border-radius:10px;border:1px solid var(--line);font:inherit;background:#fff;color:var(--ink)}
.hero-search.inline{margin:6px 0 18px}
.btn{display:inline-flex;align-items:center;gap:6px;background:var(--gold);color:var(--green-2);border:0;border-radius:10px;padding:12px 22px;font:600 1rem var(--sans);cursor:pointer;text-decoration:none}
.btn:hover{background:#e6cf98;color:var(--green-2)}

/* Sections */
.sec{padding-top:34px;padding-bottom:10px}
.page-pad{padding-top:18px;padding-bottom:40px}
.narrow{max-width:820px}
.h1{font:600 clamp(1.8rem,3.4vw,2.6rem)/1.2 var(--serif);color:var(--green);margin:6px 0 10px}
.h2{font:600 1.75rem/1.2 var(--serif);color:var(--green);margin:0 0 16px;display:flex;align-items:center;gap:12px}
.h2:after{content:"";flex:1;height:1px;background:linear-gradient(90deg,var(--gold-2),transparent)}
.h2 a{color:inherit;text-decoration:none}
.h2.light{color:var(--gold)}
.band{background:var(--green);margin-top:28px;padding-bottom:24px}

.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.cat-card{display:grid;grid-template-columns:56px 1fr;grid-template-rows:auto auto auto;column-gap:14px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:18px;text-decoration:none;color:var(--ink);box-shadow:var(--sh);transition:transform .15s,border-color .15s}
.cat-card:hover{transform:translateY(-2px);border-color:var(--gold-2);color:var(--ink)}
.cat-card .ic,.cat-card img{grid-row:1/4;width:56px;height:56px;border-radius:50%;background:var(--green);color:var(--gold);display:grid;place-items:center;object-fit:cover}
.cat-card .cn{font:600 1.35rem/1.2 var(--serif);color:var(--green)}
.cat-card .cd{font-size:.9rem;color:var(--muted);line-height:1.45;margin:3px 0 6px}
.cat-card .cc{font-size:.8rem;color:var(--gold-2);font-weight:600;letter-spacing:.02em}

.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips a{padding:9px 16px;border:1px solid rgba(217,191,134,.45);border-radius:999px;color:var(--gold-soft);text-decoration:none;font-size:.97rem}
.chips a:hover,.chips a[aria-current]{background:var(--gold);color:var(--green-2);border-color:var(--gold)}
.chips.small{margin-top:14px}
.chips.small a{padding:6px 13px;font-size:.88rem}

/* Nhóm chuyên mục */
.grp-intro{max-width:860px;color:#e2d8bd;margin:-4px 0 18px;font-size:1.05rem}
.chips.light{margin:4px 0 18px}
.chips.light a{color:var(--green);border-color:var(--gold-2);background:var(--paper)}
.chips.light a:hover{background:var(--green);color:var(--gold)}
.grp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.grp-card{display:block;border:1px solid rgba(217,191,134,.4);border-radius:var(--r);padding:16px 18px;text-decoration:none;color:var(--gold-soft);background:rgba(255,255,255,.04);transition:background .15s}
.grp-card:hover{background:rgba(217,191,134,.14);color:var(--gold-soft)}
.grp-card .gh{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.grp-card .gh span{width:40px;height:40px;border-radius:50%;border:1px solid var(--gold-2);color:var(--gold);display:grid;place-items:center;flex-shrink:0}
.grp-card .gh span svg{width:22px;height:22px}
.grp-card b{font:600 1.3rem/1.2 var(--serif);color:var(--gold)}
.grp-card p{margin:0 0 8px;font-size:.92rem;color:#d6ccb0;line-height:1.5}
.grp-card small{color:var(--gold-2);font-weight:600}

/* Cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);display:flex;flex-direction:column}
.card-img{position:relative;display:block;aspect-ratio:16/10;background:var(--green);overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.card:hover .card-img img{transform:scale(1.03)}
.card-img .ph{display:grid;place-items:center;height:100%;color:var(--gold)}
.card-img .ph svg{width:56px;height:56px;opacity:.85}
.badges{position:absolute;left:8px;bottom:8px;display:flex;gap:4px;flex-wrap:wrap}
.badges span{font-size:.72rem;font-weight:600;padding:3px 8px;border-radius:999px;background:rgba(31,47,32,.85);color:var(--gold)}
.badges .b-am-thanh{background:rgba(180,83,42,.92);color:#fff}
.card-b{padding:14px 16px 16px}
.card h3{font:600 1.25rem/1.3 var(--serif);margin:2px 0 6px}
.card h3 a{color:var(--green);text-decoration:none}
.card h3 a:hover{color:var(--lotus)}
.card p{margin:0;font-size:.93rem;color:var(--muted);line-height:1.5}
.card .crumb-s{font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px}
.card .crumb-s a{color:var(--gold-2);text-decoration:none;font-weight:600}

/* Category hero */
.cat-hero{background:var(--green);color:var(--gold-soft);padding:12px 0 26px}
.cat-hero .h1{color:var(--gold)}
.cat-hero .crumb,.cat-hero .crumb a{color:#c9bc97}
.cat-title{display:flex;gap:16px;align-items:center;margin-bottom:18px}
.cat-title .ic{width:64px;height:64px;border-radius:50%;border:1px solid var(--gold-2);color:var(--gold);display:grid;place-items:center;flex-shrink:0}
.cat-title p{margin:0;color:#e2d8bd}
.sub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.sub-grid a{background:rgba(255,255,255,.06);border:1px solid rgba(217,191,134,.3);border-radius:10px;padding:12px 14px;text-decoration:none;color:var(--gold-soft)}
.sub-grid a:hover{background:var(--gold);color:var(--green-2)}
.sub-grid b{display:block;font:600 1.15rem var(--serif)}
.sub-grid small{opacity:.75}
.crumb{font-size:.88rem;color:var(--muted);margin:6px 0}
.crumb a{color:var(--muted)}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 20px;border-bottom:1px solid var(--line);padding-bottom:10px}
.tabs a{padding:7px 14px;border-radius:999px;text-decoration:none;color:var(--ink);font-size:.93rem;border:1px solid var(--line);background:var(--paper)}
.tabs a[aria-current]{background:var(--green);color:var(--gold);border-color:var(--green)}
.tabs small{color:var(--gold-2);font-weight:600}
.pager{display:flex;gap:6px;justify-content:center;margin:30px 0 0;flex-wrap:wrap}
.pager a,.pager span{min-width:40px;text-align:center;padding:8px 12px;border-radius:8px;border:1px solid var(--line);text-decoration:none;background:var(--paper)}
.pager span[aria-current]{background:var(--green);color:var(--gold);border-color:var(--green)}

/* Post */
.post{max-width:860px;margin:0 auto}
.post .meta{color:var(--muted);font-size:.9rem;margin:0 0 18px}
.post-cover{width:100%;border-radius:var(--r);margin-bottom:18px}
.lead{font-size:1.17rem;color:#4a463a;border-left:3px solid var(--gold-2);padding-left:16px}
.prose{font-size:1.09rem;line-height:1.8}
.prose h2,.prose h3{font-family:var(--serif);color:var(--green);line-height:1.25;margin:1.6em 0 .5em}
.prose h2{font-size:1.75rem}.prose h3{font-size:1.4rem}
.prose img{border-radius:10px;display:block;margin:1em auto}
.prose blockquote{margin:1.2em 0;padding:14px 20px;background:var(--gold-soft);border-left:4px solid var(--gold-2);border-radius:0 10px 10px 0;font-family:var(--serif);font-size:1.2rem}
.prose table{border-collapse:collapse;width:100%}.prose td,.prose th{border:1px solid var(--line);padding:6px 10px}
.m-sec{margin:28px 0}
.m-sec h2{font:600 1.5rem var(--serif);color:var(--green);margin:0 0 12px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.m-video{margin:0 0 20px}
.m-video video{width:100%;border-radius:var(--r);background:#000;aspect-ratio:16/9}
.m-video figcaption{display:flex;flex-wrap:wrap;align-items:center;gap:10px;justify-content:space-between;font-size:.95rem;color:var(--muted);margin-top:6px}
.yt{position:relative;display:block;width:100%;aspect-ratio:16/9;border:0;padding:0;background:#000;border-radius:var(--r);overflow:hidden;cursor:pointer}
.yt img{width:100%;height:100%;object-fit:cover;opacity:.9}
.yt .play{position:absolute;inset:0;margin:auto;width:76px;height:54px;border-radius:14px;background:rgba(180,83,42,.95)}
.yt .play:after{content:"";position:absolute;left:30px;top:15px;border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent #fff}
.yt:hover .play{background:var(--lotus)}
.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.m-audio{list-style:none;padding:0;margin:0;counter-reset:a}
.m-audio li{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;margin-bottom:10px}
.a-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}
.a-title{font-weight:600;color:var(--green)}
.a-title:before{counter-increment:a;content:counter(a) ". ";color:var(--gold-2)}
.m-audio audio{width:100%;height:40px}
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.gallery figure{margin:0}
.gallery img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:10px;display:block}
.gallery figcaption{font-size:.85rem;color:var(--muted);padding:4px 2px;display:flex;justify-content:space-between;gap:6px}
.dl-mini{text-decoration:none;font-weight:700}
.m-files{list-style:none;padding:0;margin:0}
.m-files li{display:flex;align-items:center;gap:12px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:10px 14px;margin-bottom:8px;flex-wrap:wrap}
.ext{background:var(--lotus);color:#fff;font-size:.72rem;font-weight:700;border-radius:6px;padding:4px 7px}
.f-name{flex:1;min-width:160px;font-weight:600;color:var(--green)}
.btn-dl{display:inline-flex;align-items:center;gap:6px;background:var(--green);color:var(--gold);border-radius:8px;padding:7px 14px;text-decoration:none;font-size:.92rem;font-weight:600;white-space:nowrap}
.btn-dl:hover{background:var(--green-3);color:var(--gold)}
.btn-dl small{opacity:.75;font-weight:400}
.btn-ghost{border:1px solid var(--green);color:var(--green);border-radius:8px;padding:6px 12px;text-decoration:none;font-size:.92rem}
.tags{margin:24px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.tags a{font-size:.88rem;background:var(--gold-soft);padding:3px 10px;border-radius:999px;text-decoration:none}
.share{display:flex;gap:10px;align-items:center;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:26px;padding-top:14px;font-size:.93rem}
.share button{background:none;border:1px solid var(--line);border-radius:8px;padding:5px 10px;cursor:pointer;font:inherit}

/* Lightbox */
.lb{position:fixed;inset:0;background:rgba(15,22,15,.94);z-index:99;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px}
.lb img{max-height:80vh;max-width:96vw;border-radius:8px}
.lb .lb-bar{display:flex;gap:12px;align-items:center;color:var(--gold-soft);margin-top:12px;flex-wrap:wrap;justify-content:center}
.lb button{background:rgba(255,255,255,.1);color:#fff;border:0;border-radius:8px;padding:8px 14px;cursor:pointer;font:inherit}

/* Footer */
.foot{background:var(--green-2);color:#cfc4a6;margin-top:40px;font-size:.93rem}
.foot-in{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;padding-top:36px;padding-bottom:20px}
.foot h2{font:600 1.2rem var(--serif);color:var(--gold);margin:0 0 10px}
.foot ul{list-style:none;padding:0;margin:0}
.foot li{margin:5px 0}
.foot a{color:#e3d9bd;text-decoration:none}
.foot a:hover{color:var(--gold)}
.foot-name{font:600 1.4rem var(--serif);color:var(--gold);margin:6px 0}
.social{display:flex;gap:12px;flex-wrap:wrap}
.copy{border-top:1px solid rgba(217,191,134,.15);padding-top:12px;padding-bottom:18px;font-size:.85rem;color:#9b9177}

@media (max-width:900px){
  .hero-in{grid-template-columns:1fr;text-align:center;justify-items:center;gap:16px;padding-top:24px}
  .hero-logo{width:200px}
  .hero{padding-bottom:22px}
  .hero-in>div{min-width:0;width:100%}
  .hero-search{width:100%}
  .hero-search{margin:0 auto}
  .foot-in{grid-template-columns:1fr 1fr}
  .search-top{display:none}
  .menu-btn{display:block;margin-left:auto}
  .nav{display:none;max-height:calc(100vh - 70px);overflow:auto}
  .nav.open{display:block}
  .nav ul{flex-direction:column;padding:6px 0}
  .nav li>a{border-bottom:1px solid rgba(217,191,134,.1)}
  .nav .sub,.nav .sub.wide,.nav li.has-sub:hover .sub,.nav li.has-sub:focus-within .sub{display:none;position:static;box-shadow:none;background:transparent;border:0;min-width:0;padding:0 0 8px 14px}
  .nav li.has-sub.open .sub{display:grid !important;grid-template-columns:1fr 1fr}
  .nav .sub a{color:#d9cfb3;padding:6px 10px}
  .nav li.has-sub.open .sub.grp{grid-template-columns:1fr}
  .nav .sub.grp b{color:var(--gold-soft);font-size:1rem}
  .nav .sub.grp small{display:none}
  .nav li.has-sub>a{padding-right:44px}
  .nav .tg{display:block;position:absolute;right:6px;top:4px;background:none;border:0;color:var(--gold);font-size:1.3rem;width:36px;height:36px;cursor:pointer}
}
@media (max-width:560px){
  .wrap{padding:0 14px}
  .brand img{height:42px}.brand b{font-size:1.35rem}
  .fs{display:none}
  .foot-in{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr 1fr;gap:12px}
  .card h3{font-size:1.05rem}.card p{display:none}.card-b{padding:10px 12px}
  .sub-grid{grid-template-columns:1fr 1fr}
  .grp-card p{display:none}
  .cat-grid{grid-template-columns:1fr 1fr;gap:10px}
  .cat-card{grid-template-columns:1fr;padding:14px;text-align:center;justify-items:center}
  .cat-card .ic{grid-row:auto;width:46px;height:46px;margin-bottom:6px}
  .cat-card .cd{display:none}
  .cat-card .cn{font-size:1.15rem}
  .hero-search .btn{padding:12px 16px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* Hộp thông tin, bản đồ, mua sách, lọc tỉnh */
.info-box{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--gold-2);border-radius:var(--r);padding:16px 20px;margin:0 0 22px;box-shadow:var(--sh)}
.info-box dl{display:grid;grid-template-columns:minmax(120px,32%) 1fr;gap:6px 16px;margin:0 0 4px}
.info-box dt{color:var(--muted);font-size:.92rem}
.info-box dd{margin:0;font-weight:600;color:var(--ink)}
.info-box .map{margin-top:10px}
.buy-box{background:linear-gradient(135deg,#fffaf0,var(--gold-soft));border:1px solid var(--gold-2);border-radius:var(--r);padding:16px 20px;margin:0 0 24px}
.buy-box h2{font:600 1.4rem var(--serif);color:var(--green);margin:0 0 10px}
.buy-box ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.buy-btn{display:flex;flex-direction:column;gap:2px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.buy-btn:hover{border-color:var(--lotus);transform:translateY(-1px);color:var(--ink)}
.buy-btn b{color:var(--green)}
.buy-btn span{color:var(--lotus);font-weight:700}
.buy-btn i{font-style:normal;font-size:.85rem;color:var(--gold-2);font-weight:600}
.sm{font-size:.85rem}
.badges .b-buy{background:rgba(196,163,95,.95);color:var(--green-2)}
.card .pv{font-size:.82rem;color:var(--gold-2);font-weight:600;margin:0 0 4px}
.prov{display:flex;align-items:center;gap:8px;margin:-8px 0 18px;flex-wrap:wrap}
.prov label{font-size:.93rem;color:var(--muted)}
.prov select{padding:8px 12px;border-radius:8px;border:1px solid var(--line);font:inherit;background:var(--paper)}
@media (max-width:560px){.info-box dl{grid-template-columns:1fr}.info-box dt{margin-top:6px}}

/* Chân trang: Facebook, chịu trách nhiệm nội dung, Bộ Công Thương */
.fb-link{display:inline-flex;align-items:center;gap:8px;background:#1877f2;color:#fff!important;border-radius:8px;padding:7px 12px;font-weight:600;font-size:.9rem;word-break:break-all}
.fb-link:hover{background:#0f63d6}
.resp{font-size:.88rem;color:#d9cfb3;border-left:2px solid var(--gold-2);padding-left:10px}
.bct img{width:150px;height:auto;display:block}
.copy a{color:var(--gold)}
.copy .sep{opacity:.5;margin:0 4px}

/* ===== Trang chi tiết bài: bố cục 2/3 + thanh bên ===== */
.post-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(280px,1fr);gap:44px;align-items:start}
.post-grid{display:block}
.post-layout .post{max-width:none;margin:0}
.tools{position:relative}
.tools-in{position:sticky;top:120px;display:flex;flex-direction:column;align-items:center;gap:10px;background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:10px 0;box-shadow:var(--sh)}
.tools-share{display:flex;flex-direction:column;gap:8px}
.tools-share a,.tools-share button,.tool-print{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line);background:#fff;color:var(--green);cursor:pointer;text-decoration:none;padding:0}
.tools-share a:hover,.tools-share button:hover,.tool-print:hover{background:var(--green);color:var(--gold)}
.tool-fs{display:flex;flex-direction:column;align-items:center;border-top:1px solid var(--line);padding-top:6px;font-size:.85rem;color:var(--muted)}
.tool-fs button{background:none;border:0;font-size:1.2rem;cursor:pointer;color:var(--green);width:36px;height:28px}
.post-top{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin:4px 0 10px}
.post-cats{display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--green);border-radius:8px;padding:8px 16px}
.post-cats a{color:var(--gold);text-transform:uppercase;font:600 .95rem/1.3 var(--sans);letter-spacing:.03em;text-decoration:none}
.post-cats a:hover{color:#f0dcae}
.post-cats a:hover{text-decoration:underline}
.post-cats span{color:rgba(217,191,134,.5);font-size:.85rem}
.rt{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:.95rem}
.post-title{font:700 clamp(1.9rem,3.6vw,2.9rem)/1.18 var(--serif);color:#1d2b1e;margin:6px 0 18px}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0;margin-bottom:22px}
.by{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:.95rem}
.by b{color:var(--green);font-family:var(--serif);font-size:1.05rem}
.by .av{width:34px;height:34px;border-radius:50%;background:var(--green);color:var(--gold);display:grid;place-items:center;font-weight:700}
.by .sep{width:1px;height:20px;background:var(--line)}
.share-sq{display:flex;gap:6px}
.share-sq a,.share-sq button{width:42px;height:42px;display:grid;place-items:center;background:var(--green);color:#fff;border:0;cursor:pointer;text-decoration:none;padding:0;transition:background .15s}
.share-sq a:hover,.share-sq button:hover{background:var(--lotus);color:#fff}
.copy-link.done{background:var(--gold)!important;color:var(--green)!important}
.post .lead{font-size:1.22rem;line-height:1.7;color:#55524a;border:0;padding:0;margin:0 0 20px}
.post-note{background:#f3f2ee;border-left:5px solid #5a5f5c;border-radius:4px;padding:16px 22px;margin:30px 0 18px;font-size:1rem;line-height:1.75}
.post-note p{margin:.4em 0}
.post-note a{color:#d43a2b;font-weight:700;text-decoration-style:dotted}
.share-end{display:flex;align-items:center;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:22px;padding-top:14px;color:var(--muted)}
.sidebar{display:flex;flex-direction:column;gap:22px}
.sb-box{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:16px 16px 14px;box-shadow:var(--sh)}
.sb-h{font:700 1.15rem var(--serif);color:var(--green);text-transform:uppercase;letter-spacing:.04em;margin:0 0 12px;padding-bottom:8px;border-bottom:2px solid var(--lotus);display:flex}
.sb-banners{padding:0;overflow:hidden;display:flex;flex-direction:column;gap:12px;background:none;border:0;box-shadow:none}
.sb-banner{display:block;border-radius:var(--r);overflow:hidden;box-shadow:var(--sh)}
.sb-banner img{display:block;width:100%;height:auto}
.sb-banner-def{background:radial-gradient(ellipse at 50% 30%,#35503a,var(--green-2));color:var(--gold-soft);text-align:center;padding:24px 20px 26px;text-decoration:none;display:flex;flex-direction:column;align-items:center;gap:8px;min-height:480px;justify-content:center}
.sb-banner-def img{width:82%;border-radius:12px}
.sb-banner-def b{font:700 1.45rem/1.25 var(--serif);color:var(--gold)}
.sb-banner-def span{font-size:.95rem}
.sb-banner-def i{font-style:normal;background:var(--gold);color:var(--green-2);border-radius:999px;padding:8px 18px;font-weight:700;margin-top:6px}
.sb-list{list-style:none;padding:0;margin:0}
.sb-list li+li{border-top:1px dashed var(--line)}
.sb-item{display:flex;gap:12px;padding:9px 0;text-decoration:none;color:var(--ink);align-items:flex-start}
.sb-item:hover b{color:var(--lotus)}
.sb-th{width:84px;height:60px;flex-shrink:0;border-radius:6px;overflow:hidden;background:var(--green)}
.sb-th img{width:100%;height:100%;object-fit:cover;display:block}
.sb-t{display:flex;flex-direction:column;gap:3px;min-width:0}
.sb-t b{font:600 1rem/1.3 var(--serif);color:#1d2b1e;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.sb-t small{color:var(--muted);font-size:.8rem}
.sb-n{font:700 2rem/1 var(--serif);color:var(--gold-2);width:34px;flex-shrink:0;text-align:center}
.sb-box .yt{border-radius:8px}
.sb-vt{margin:8px 0 4px;font:600 1rem/1.35 var(--serif)}
.sb-vt a{color:#1d2b1e;text-decoration:none}
.sb-more{display:inline-block;margin-top:8px;font-size:.9rem;font-weight:600}
.sb-audio{list-style:none;padding:0;margin:0;counter-reset:none}
.sb-audio li{display:flex;gap:10px;align-items:flex-start;padding:9px 0}
.sb-audio li+li{border-top:1px dashed var(--line)}
.sb-play{width:38px;height:38px;flex-shrink:0;border-radius:50%;border:0;background:var(--lotus);color:#fff;cursor:pointer;font-size:.9rem;display:grid;place-items:center}
.sb-play.on{background:var(--green);color:var(--gold)}
.sb-audio small a{color:var(--muted)}
.sb-bar{height:3px;background:var(--line);border-radius:2px;margin-top:5px;overflow:hidden;display:none}
.sb-play.on~.sb-t .sb-bar{display:block}
.sb-bar i{display:block;height:100%;width:0;background:var(--lotus)}

@media (max-width:1000px){.post-layout{grid-template-columns:1fr}.sb-banner-def{min-height:0}}
@media (max-width:560px){.share-sq a,.share-sq button{width:38px;height:38px}.post-meta{flex-direction:column;align-items:flex-start}.by .sep{display:none}}
@media print{
  .top,.notice,.foot,.sidebar,.tools,.share-sq,.share-end,.sec,.skip,.btn-dl,.buy-box,.yt,video,audio{display:none!important}
  body{background:#fff;font-size:12pt}.post-layout,.post-grid{display:block}.post-note{break-inside:avoid}
  a{color:#000;text-decoration:none}
}

/* Ảnh lớn trang chủ: ẩn trên điện thoại (tùy chọn trong Cài đặt) */
@media (max-width:900px){.hero-logo.hide-m{display:none}.hero-in{padding-top:22px}}

.share-sq .tool-print{width:42px;height:42px;border-radius:0;border:0;background:var(--green);color:#fff}
.share-sq .tool-print:hover{background:var(--lotus);color:#fff}
@media (max-width:560px){.share-sq .tool-print{width:38px;height:38px}}

/* Nội dung từ trình soạn thảo: căn lề ảnh, chú thích, bảng, video chèn giữa bài */
.prose figure{margin:1.2em 0}
.prose figure img{margin:0 auto}
.prose figcaption{text-align:center;font-size:.9rem;color:var(--muted);margin-top:6px;font-style:italic}
.prose .align-left{float:left;max-width:48%;margin:.3em 1.4em 1em 0}
.prose .align-right{float:right;max-width:48%;margin:.3em 0 1em 1.4em}
.prose .align-center{margin-left:auto;margin-right:auto;text-align:center}
.prose::after{content:"";display:table;clear:both}
.prose table{margin:1.2em 0;font-size:.98rem}
.prose th{background:var(--gold-soft);color:var(--green)}
.prose tr:nth-child(even) td{background:rgba(239,227,196,.3)}
.prose mark{background:#fff2a8;padding:0 .15em}
.prose .m-video.in-body{margin:1.4em 0}
.preview-bar{position:sticky;top:0;z-index:50;background:#a8361c;color:#fff;text-align:center;padding:9px 14px;font-weight:600}
.preview-bar button{margin-left:10px;background:#fff;color:#a8361c;border:0;border-radius:6px;padding:4px 12px;cursor:pointer;font-weight:700}
.pass-box{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--gold-2);border-radius:var(--r);padding:20px 22px;margin:10px 0 24px}
.pass-box input{padding:11px 14px;border:1px solid var(--line);border-radius:8px;font:inherit;min-width:240px;margin:6px 8px 6px 0}
.pass-err{color:#a8361c;font-weight:600}
@media (max-width:560px){.prose .align-left,.prose .align-right{float:none;max-width:100%;margin:1em 0}}
/* ===== Tài liệu PDF ===== */
.pdf-card{border:1px solid #e3d9bf;border-radius:12px;background:#fffdf7;margin:0 0 12px;overflow:hidden}
.pdf-row{display:flex;align-items:center;gap:12px;padding:12px 14px;flex-wrap:wrap}
.pdf-ic{flex:0 0 auto;width:46px;height:56px;border-radius:6px;background:#a8361c;color:#fff;font:800 .78rem/56px system-ui,sans-serif;text-align:center;letter-spacing:.5px;box-shadow:inset -8px -8px 0 rgba(0,0,0,.12)}
.pdf-meta{flex:1 1 220px;min-width:0}
.pdf-meta b{display:block;font-family:inherit;color:#1f3a24;line-height:1.35;word-break:break-word}
.pdf-meta small{color:#6d6656;font-size:.84rem}
.pdf-meta small a{color:#8a6a1f}
.pdf-btns{display:flex;gap:6px;flex-wrap:wrap}
.pdf-btn{display:inline-flex;align-items:center;gap:5px;padding:7px 12px;border-radius:8px;border:1px solid #c9b783;background:#fff;color:#1f3a24;font:600 .85rem system-ui,sans-serif;cursor:pointer;text-decoration:none}
.pdf-btn:hover{background:#f4ecd6}
.pdf-btn.dl{background:#244a2c;border-color:#244a2c;color:#e9cf8c}
.pdf-btn.dl:hover{background:#1a3820}
.pdf-btn:disabled{opacity:.6;cursor:wait}
.pdf-frame{border-top:1px solid #e3d9bf;background:#525659}
.pdf-frame iframe{display:block;width:100%;height:min(80vh,900px);border:0}
.pdf-filter{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.pdf-filter input{flex:1 1 240px;padding:10px 12px;border:1px solid #d8ccab;border-radius:10px;font:inherit}
.pdf-filter select{padding:10px;border:1px solid #d8ccab;border-radius:10px;font:inherit;background:#fff}
.m-sec h2 small{font-size:.6em;font-weight:500;color:#7a735f;font-family:system-ui,sans-serif;margin-left:6px}
@media (max-width:600px){.pdf-btn span{display:none}.pdf-btn{padding:9px 11px}.pdf-btn.dl span{display:inline}}
@media print{.pdf-btns,.pdf-frame{display:none!important}}
/* ===== Sách lật – lõi StPageFlip (MIT) =====
 */
 .stf__parent { position: relative; display: block; box-sizing: border-box; transform: translateZ(0); -ms-touch-action: pan-y; touch-action: pan-y; } .sft__wrapper { position: relative; width: 100%; box-sizing: border-box; } .stf__parent canvas { position: absolute; width: 100%; height: 100%; left: 0; top: 0; } .stf__block { position: absolute; width: 100%; height: 100%; box-sizing: border-box; perspective: 2000px; } .stf__item { display: none; position: absolute; transform-style: preserve-3d; } .stf__outerShadow { position: absolute; left: 0; top: 0; } .stf__innerShadow { position: absolute; left: 0; top: 0; } .stf__hardShadow { position: absolute; left: 0; top: 0; } .stf__hardInnerShadow { position: absolute; left: 0; top: 0; }
/* ===== Sách lật – giao diện ===== */
.fb{--fbbg:#2b2a26;background:radial-gradient(ellipse at center,#3a3832 0%,#22211d 75%);color:#efe6cf;padding:0 0 18px;margin-bottom:28px}
.fb-head{padding-top:14px}
.fb-head .crumb,.fb-head .crumb a{color:#cdbf98}
.fb-head h1{font-family:var(--serif,Georgia,serif);color:#f3e2b5;font-size:clamp(1.3rem,3vw,2rem);margin:6px 0 10px}
.fb-stage{position:relative;display:flex;align-items:center;justify-content:center;gap:8px;padding:6px 10px 14px;min-height:280px}
.fb-book-wrap{flex:1;min-width:0;display:flex;justify-content:center}
.fb-book{width:100%;max-width:100%;margin:0 auto}
.fb .stf__wrapper{width:100%;height:100%}
.fb-page{background:#fdfbf4;overflow:hidden;position:relative}
.fb-page img{display:block;width:100%;height:100%;object-fit:contain;user-select:none;-webkit-user-drag:none;background:#fdfbf4}
.fb-page .fb-num{position:absolute;bottom:4px;left:0;right:0;text-align:center;font:600 11px/1 system-ui,sans-serif;color:rgba(0,0,0,.35);pointer-events:none}
.fb-page[data-density=hard]{box-shadow:inset 0 0 0 1px rgba(0,0,0,.12)}
.fb-side{flex:0 0 46px;height:96px;border:0;border-radius:12px;background:rgba(255,255,255,.08);color:#f3e2b5;font-size:2.4rem;cursor:pointer;line-height:1}
.fb-side:hover{background:rgba(255,255,255,.18)}
.fb-loading{position:absolute;inset:0;display:grid;place-items:center;margin:0;color:#cdbf98}
.fb:not(.ready) .fb-book{visibility:hidden}
.fb-bar{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;align-items:center;padding:10px;margin:8px auto 0;max-width:980px}
.fb-bar button,.fb-bar a{display:inline-flex;align-items:center;gap:4px;border:1px solid rgba(233,207,140,.35);background:rgba(255,255,255,.06);color:#f3e2b5;border-radius:8px;padding:7px 11px;font:600 .88rem system-ui,sans-serif;cursor:pointer;text-decoration:none}
.fb-bar button:hover,.fb-bar a:hover{background:rgba(233,207,140,.2)}
.fb-pg{display:inline-flex;align-items:center;gap:6px;font:600 .9rem system-ui,sans-serif;color:#efe6cf;margin:0 4px}
.fb-pg input{width:64px;padding:6px;border-radius:8px;border:1px solid rgba(233,207,140,.45);background:#1b1a17;color:#fff;text-align:center;font:inherit}
.fb-sep{width:1px;height:24px;background:rgba(233,207,140,.3);margin:0 4px}
.fb-tip{font-size:.82rem;text-align:center;color:#a99f86!important;margin:4px auto 0}
.fb-desc{color:#e3d9bf;margin-top:10px;font-size:.98rem;line-height:1.7}
.fb.is-full{display:flex;flex-direction:column;justify-content:center;padding:10px;margin:0;overflow:auto}
.fb.is-full .fb-head,.fb.is-full .fb-tip,.fb.is-full .fb-desc{display:none}
.fb-thumbs{position:fixed;inset:0;z-index:300;background:rgba(15,15,12,.88);display:flex;align-items:center;justify-content:center;padding:16px}
.fb-thumbs[hidden],.fb-zoom[hidden]{display:none}
.fb-th-in{background:#2b2a26;border-radius:14px;width:min(1100px,100%);max-height:100%;display:flex;flex-direction:column}
.fb-th-h{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid rgba(233,207,140,.2)}
.fb-th-h button{background:none;border:1px solid rgba(233,207,140,.4);color:#f3e2b5;border-radius:8px;padding:5px 10px;cursor:pointer}
.fb-th-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:12px;padding:16px;overflow:auto}
.fb-th-grid button{background:none;border:2px solid transparent;border-radius:6px;padding:0;cursor:pointer;color:#cdbf98;font:600 .8rem system-ui}
.fb-th-grid button.on,.fb-th-grid button:hover{border-color:#e9cf8c}
.fb-th-grid img{width:100%;aspect-ratio:3/4;object-fit:contain;background:#fdfbf4;display:block;border-radius:4px}
.fb-zoom{position:fixed;inset:0;z-index:310;background:rgba(10,10,8,.94);overflow:auto;padding:50px 10px 20px;text-align:center}
.fb-zin{display:flex;gap:6px;justify-content:center;align-items:flex-start;flex-wrap:wrap}
.fb-zin img{max-width:min(100%,900px);height:auto;cursor:zoom-in;background:#fff}
.fb-zoom.big .fb-zin img{max-width:none;width:min(1800px,180vw);cursor:zoom-out}
.fb-zx{position:fixed;top:10px;right:14px;z-index:2;width:40px;height:40px;border-radius:50%;border:0;background:#e9cf8c;color:#1f3a24;font-size:1.2rem;cursor:pointer}
.fb-toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%);background:#e9cf8c;color:#1f3a24;padding:9px 16px;border-radius:10px;z-index:400;font:600 .9rem system-ui}
@media (max-width:760px){.fb-side{display:none}.fb-bar button span,.fb-bar a span{display:none}.fb-sep{display:none}.fb-stage{padding:4px}}
@media print{.fb-bar,.fb-side,.fb-tip{display:none}}
/* Thẻ sách lật */
.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:22px;margin:18px 0}
.book-card{display:flex;flex-direction:column;gap:10px;text-decoration:none;color:inherit}
.bk-cover{position:relative;display:block;border-radius:4px 10px 10px 4px;overflow:hidden;background:#efe6cf;box-shadow:0 10px 24px rgba(0,0,0,.22),0 2px 4px rgba(0,0,0,.15);transition:transform .25s}
.bk-cover img{width:100%;height:100%;object-fit:cover;display:block}
.bk-spine{position:absolute;left:0;top:0;bottom:0;width:14px;background:linear-gradient(90deg,rgba(0,0,0,.28),rgba(255,255,255,.12) 60%,transparent)}
.book-card:hover .bk-cover{transform:translateY(-4px) rotate(-1deg)}
.bk-meta{display:flex;flex-direction:column;gap:3px}
.bk-meta b{color:#1f3a24;font-size:1.02rem;line-height:1.35}
.bk-meta small{color:#7a735f;font:600 .78rem system-ui,sans-serif}
.bk-desc{color:#5b574b;font-size:.9rem}
.bk-btn{color:#8a5a12;font:700 .86rem system-ui,sans-serif;margin-top:2px}
.book-card.in-body{flex-direction:row;align-items:center;gap:18px;background:#fffdf7;border:1px solid #e3d9bf;border-radius:14px;padding:14px;margin:1.2em 0}
.book-card.in-body .bk-cover{width:120px;flex:0 0 120px}
.book-card.in-body .bk-btn{display:inline-block;align-self:flex-start;background:#244a2c;color:#e9cf8c;border-radius:8px;padding:8px 14px;margin-top:8px}
@media (max-width:520px){.book-card.in-body .bk-cover{width:90px;flex-basis:90px}}